Lightfoot’s car had been set aflame in the 16000 block of Preston Road. She was dead inside the car by the time authorities found the vehicle.

Despite the medical examiner’s ruling, a Dallas Police Department news release said detectives would still investigate her death as a homicide. The cause of death, the ME found, was from smoke inhalation and thermal injury.

“This case will remain open until conclusive evidence is found that fully explains Ms. Lightfoot’s death,” read a department news release.